Australia Telescope Online Archive

Welcome to the Australia Telescope Online Archive (ATOA). The ATOA provides access to:

  • Australia Telescope Compact Array unprocessed data taken between 3 Jun 1990 and 15 Aug 2025;
  • Mopra (mostly MOPS) unprocessed data taken between 10 May 1998 and 30 Mar 2026;
  • Parkes unprocessed spectral line and continuum data taken between 18 Apr 1991 and and 18 Apr 2026;
  • VLBI correlated long baseline data taken from Nov 1993 onwards;
  • Data products from several surveys with the Mopra Telescope.

To login: The ATOA uses the OPAL user account system. To register with OPAL and the ATOA, change your account details, or to reset your password, see the links on the OPAL Home Page.

The ATOA Search produces a list of matching files or a summary list of observations. To download data files requires an OPAL user account and password access. Access to data files is subject to the ATNF data access conditions.

If you have any problems using the ATOA then please use the Contact Us link to send an email to the ATOA and OPAL adminstrators.

ATOA News

May 2026

We are in the process of migrating the data stored in ATOA to CASDA. ATOA will remain online until the migration is complete and all data are available in CASDA. Access to data in CASDA during an embargo period works the same way as in ATOA: during the embargo, only project members may download the data and users must authenticate with CASDA using their OPAL / ATOA credentials. Data not under embargo are publicly accessible. For more information, please refer to the CASDA User Guide.

All new data will be archived in CASDA and not ATOA. For the ATCA, all data recorded after 15 Aug 2025 will be available in CASDA only. This includes all observations conducted with the new BIGCAT correlator. For Murriyang, all raw spectral line and continuum data recorded after 18 Apr 2026 will be availble in CASDA only.

Please note that there may be delays with archiving. If you cannot find the data for your observations and require urgent access to it, please contact us.

August 2016

The ATOA and the ATOA Users Guide have recently been upgraded to facilitate downloads of large files and large numbers of files, and to provide support for large-scale searches.

In addition to the standard search form, ATOA metadata describing observations carried out with ATNF facilities, can now be explored using Virtual Observatory services. Please see the ATOA Users Guide for information and instructions.